I Had Unprotected Sex And I Didn't Get Pregnant. Why?

Some teens who have sex and don’t get pregnant falsely think it can’t happen to them (or that they are sterile). Much more likely, it’s a case of pure luck. While millions of sperm spill out with every ejaculation, a uterus produces only one egg each month. To become pregnant, peis-vagina sex must occur around the time of the month that the egg is released from the ovary and is traveling down the fallopian tubes. For people with regular periods, the egg is usually released each month about 14 days before their next period. [AA-008]